Wheel ob tool



S. G. ASHBY. GRINbLNG WHEEL 0R TooL.-

APPLICATION FILED MAR. |6.1915.

Patented Aug. 8, 1916.

SYDNEY GUY ASHBY, OE EDENBRIDGE, ENGLAND.

GRINJDING WHEEL OR TOOL.

Application filed March 16, 1915.

To all fro/tom t may concern.'

Be it known that I, SYDNEY GUY AsHBY, a subject of the King of Great Britain, residing in Edenbridge, England, have 1nvented certain new and useful Improvements in and Connected with Grinding Wheels or Tools, of which the followingis a specification.

This invention relates to improvements in and connected with grinding Wheels and 1s designed to provide a grinding wheel capable of being used upon an ordinary lathe, and operated at a high speed.

The ordinary speed of rotation of a lathe is not generally suciently high for effective grinding and this is of course particularly so with grinding wheels of small d1- ameter and the object of the present invention is to provide .means whereby a high speed of rotation may be obtained upon a lathe.

The invention consists essentially in a frame or carrier adapted to be centered in the loose headstock of a lathe and carrying at its end a spindle adapted to be secured in a chuck or the like carried by the fixed head stock, a secondary spindle to carry the grinding wheel driven by gearing from the rst spindle being provided in the frame or carrier.

The invention will be fully described with reference to the accompanying drawings.

Figure l is a sectional plan through the tool. Fig. 2 is a partial section and end view of same.

As shown in the drawings, the apparatus comprises a frame or carrier A adapted to be mounted in a lathe, agrinding wheel B out of center with the carrier and means carried by the carrier for driving the wheel B from the fast head stock.

The carrier A comprises a spigot portion C adapted to be centered in the loose headstock of the lathe and a gear boXD adapted to receive the gearfor driving the grinding wheel. This box is made with one side E removable so that the gear may be inserted in the boX, screws c or other means being provided to hold it in position.

In the gear boX alined with the spigot portion C and projecting outward through the removable side E is j ournaled a spindle F the outer end of which is adapted to be Specification of Letters Patent. I

Patented Aug., 8,. 1916.

Serial No. 14,745.

gripped or held by a chuck or the like capable of being rotated in the ordinary way in the fast headstock of the lathe.

Upon the spindle F in the gear boX D is mounted a wheel G adapted to gear with or otherwise drive the secondary spindle H by means of the wheel J, the relations of the wheels G and J being chosen according to the speed of rotation of the spindle F and the desired speed of rotation of the spindle H. The spindle. H may be arranged so as to project at one side only of the gear box D or it may project at both sides as shown, each end being adapted to carry a grinding wheel B mounted on the spindle in any suitable manner. The gear boX D may be lilled with oil for lubricating purposes. It will be obvious that instead of the wheel G gearing directly with the wheel J, intermediate wheels may, `in known manner, be employed, where a greater speed is required.

Having now particularly described the nature of my said invention and the best means I know of carrying the same into practical effect, I claim:-

l. A grinding tool for use in combination with lathes, comprising a frame adapted to be held engaged on one side thereof by the loose headstock of a lathe, a spindle extending from the other side of said frame and adapted to be secured in a chuck carried by the fixed headstock of the lathe, and a grinding wheel carried by the frame driven from said spindle.

2. A grinding tool for use in combination with lathes comprising a frame having a projecting portion at one end thereof adapted to be centered in the loose headstock of a lathe, a spindle journaled on the opposite end of the frame and adapted to have the projecting end thereof secured in the chuck carried by the fast headstock of the lathe, a second spindle journaled on the frame, a grinding wheel on said second spindle, and means for driving said second spindle from said rst spindle.

3. A grinding tool for use in combination with lathes comprising a frame consisting of a gear box having a projecting portion at one end thereof and adapted to be centered to be secured in the chuck carried by the n testimony whereof I have' signed my fast headstock of the lathe, a second spindle name to this specification in the presence of journaled in the gear box and projecting two subscribing Witnessesl therefrom, a grinding Wheel fast to the pro- SYDNEY GUY ASHBY. jecting' end of said spindle, and means for driving said second spindle from said first spindle.

Witnesses:

J 0sEPH-M1LLARD, Y JOHN W. PATCHING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

